New upstream version 18.02

[deb_dpdk.git] / drivers / net / virtio / virtqueue.c

diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index c3a536f..a7d0a9c 100644 (file)
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation
  */
 #include <stdint.h>
 
@@ -37,6 +8,7 @@
 #include "virtqueue.h"
 #include "virtio_logs.h"
 #include "virtio_pci.h"
+#include "virtio_rxtx_simple.h"
 
 /*
  * Two types of mbuf to be cleaned:
@@ -44,26 +16,50 @@
  * 2) mbuf that hasn't been consued by backend.
  */
 struct rte_mbuf *
-virtqueue_detatch_unused(struct virtqueue *vq)
+virtqueue_detach_unused(struct virtqueue *vq)
 {
        struct rte_mbuf *cookie;
-       int idx;
+       struct virtio_hw *hw;
+       uint16_t start, end;
+       int type, idx;
 
-       if (vq != NULL)
-               for (idx = 0; idx < vq->vq_nentries; idx++) {
+       if (vq == NULL)
+               return NULL;
+
+       hw = vq->hw;
+       type = virtio_get_queue_type(hw, vq->vq_queue_index);
+       start = vq->vq_avail_idx & (vq->vq_nentries - 1);
+       end = (vq->vq_avail_idx + vq->vq_free_cnt) & (vq->vq_nentries - 1);
+
+       for (idx = 0; idx < vq->vq_nentries; idx++) {
+               if (hw->use_simple_rx && type == VTNET_RQ) {
+                       if (start <= end && idx >= start && idx < end)
+                               continue;
+                       if (start > end && (idx >= start || idx < end))
+                               continue;
+                       cookie = vq->sw_ring[idx];
+                       if (cookie != NULL) {
+                               vq->sw_ring[idx] = NULL;
+                               return cookie;
+                       }
+               } else {
                        cookie = vq->vq_descx[idx].cookie;
                        if (cookie != NULL) {
                                vq->vq_descx[idx].cookie = NULL;
                                return cookie;
                        }
                }
+       }
+
        return NULL;
 }
 
 /* Flush the elements in the used ring. */
 void
-virtqueue_flush(struct virtqueue *vq)
+virtqueue_rxvq_flush(struct virtqueue *vq)
 {
+       struct virtnet_rx *rxq = &vq->rxq;
+       struct virtio_hw *hw = vq->hw;
        struct vring_used_elem *uep;
        struct vq_desc_extra *dxp;
        uint16_t used_idx, desc_idx;
@@ -74,13 +70,27 @@ virtqueue_flush(struct virtqueue *vq)
        for (i = 0; i < nb_used; i++) {
                used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
                uep = &vq->vq_ring.used->ring[used_idx];
-               desc_idx = (uint16_t)uep->id;
-               dxp = &vq->vq_descx[desc_idx];
-               if (dxp->cookie != NULL) {
-                       rte_pktmbuf_free(dxp->cookie);
-                       dxp->cookie = NULL;
+               if (hw->use_simple_rx) {
+                       desc_idx = used_idx;
+                       rte_pktmbuf_free(vq->sw_ring[desc_idx]);
+                       vq->vq_free_cnt++;
+               } else {
+                       desc_idx = (uint16_t)uep->id;
+                       dxp = &vq->vq_descx[desc_idx];
+                       if (dxp->cookie != NULL) {
+                               rte_pktmbuf_free(dxp->cookie);
+                               dxp->cookie = NULL;
+                       }
+                       vq_ring_free_chain(vq, desc_idx);
                }
                vq->vq_used_cons_idx++;
-               vq_ring_free_chain(vq, desc_idx);
+       }
+
+       if (hw->use_simple_rx) {
+               while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
+                       virtio_rxq_rearm_vec(rxq);
+                       if (virtqueue_kick_prepare(vq))
+                               virtqueue_notify(vq);
+               }
        }
 }